Continuous-Time Quantum Monte Carlo Algorithm for the Lattice Polaron

Details Continuous-Time Quantum Monte Carlo Algorithm for the Lattice Polaron Continuous-Time Quantum Monte Carlo Algorithm for the Lattice Polaron

1998-08-14

arxiv.org/abs/cond-mat/9808155v2

Phys. Rev. Lett., v.81, 5382 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, published version

Scientific paper

10.1103/PhysRevLett.81.5382

An efficient continuous-time path-integral Quantum Monte Carlo algorithm for the lattice polaron is presented. It is based on Feynman's integration of phonons and subsequent simulation of the resulting single-particle self-interacting system. The method is free from the finite-size and finite-time-step errors and works in any dimensionality and for any range of electron-phonon interaction. The ground-state energy and effective mass of the polaron are calculated for several models. The polaron spectrum can be measured directly by Monte Carlo, which is of general interest.

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